Improvement in preserving woods



dotted fitatrz $312M djijiirr.

BENJAMIN HL DETWILER' AND SAMUEL e. VAN GILDER, or WILLIAMS- PORT, PENNSYLVANIA.

Letters Patent No. 111,045, dated January 17, 1,871.

IMPROVEMENT I N PRESERVING WOODS.

The Schedule referred to in these Letters Patent and making or the same.

To all whom it may concern Be it known that we, BENJAMIN H..DETWILER and SAMUnL G. VAN GILDER, of Williarnsport, in the county of Lycoming and in the State of Pennsylvania, have invented certain newand useful Improvements in Process for Preserving Wood; and do hereby declare that the following is a full, clear, and c2;- act description thereof.

The nature of our invention consists in a new process of preserving wood by ejecting the sap by use of steam, and then introducing resin, pitch, asphalt or its equivalents, held in solution by the use of potroleum or any of its distillatcs, as will be hereinafter fully set forth.

The wood which it is desired to preserve is first subjected to the usual steam process, whereby the sap and all extraneous matter is ejected, thus coagulating the albumenoids, and at the same time expanding the woody fiber, preparing the wood so as to rc ceive the solution.

Any one of the following materials, namely, resin, pitch, asphalt, parafline, &c., are then dissolved in suitable proportions by the use of crude or refined petroleum, benzine, liquid paraffine, or any product whatsoever manufactured out of or from petroleum.

What we claim as new, and desire to secure by Let ters Patent, is--- The above-described process for preserving wood, consisting of the ejection of the sap by-steam, or otherwise, and the introduction of resin, pitch, as-

p'halt or its equivalents, held in solution by the use of petroleum or anyof its distillates, substantially as herein set fort-l1.

In testimony that we claim the foregoing we have hereunto set our hands this 3d day of January, 1871.

BQ H. DETWILER.

S. G. VAN GILDER.

Witnesses O. L; Evnn'r, J. M. MASON. 

